Thread: Throat Erosion - New Barrel

Originally Posted by GWH

Going from .4 inch to 4 inch after 200 rounds, id also suggest its a carbon problem, as ive experienced similar big change in grouping, and after trying everything else to no avail, polishing out the carbon got me back to .5 moa.

Get some autosol on a patch and polish it back and forth, focus on one third of the barrel length at a time, just be careful you dont pull it back thru the muzzle.

You could change the patch for each third and add more autosol polish on each one.

Then after polishing give it a normal clean with your normal chemical to flush out the polish and carbon residue.

Id try this first and test shoot.

JBs is fine but please please not autosol!!